Abstract

We describe a patient with acute cardiogenic shock due to cardiac involvement in idiopathic
hypereosinophilic syndrome (Löffler endocarditis). At the echocardiography, there
was a huge mass in the left ventricular cavity, resulting in inflow- and outflow tract
obstruction. The posterior leaflet of the mitral valve apparatus was completely embedded
in a big (organized) thrombus mass. The patient was treated with high dose corticosteroids,
however without effect. Partial remission was achieved after treatment with hydroxycarbamide.
He was also treated with anticoagulants and high dose beta-blockers. The patient’s
condition improved remarkably after correction of the mitral valve insufficiency by
a mitral valve bioprosthesis.